134 DIPTERA OF NORTH AMERICA. 



the tarsi is dull red, as in Dick, caudata, but generally somewhat 

 paler. 

 Hal. Middle States. (Osten-Sacken.) 



Note. This species lias been described for the first time by Mr. Loew in 

 1860 in his paper: Die Europseischen Ephydriniden (in Loew's Neue Bei- 

 traege, VII, p. 5). 0. S. 



% 



Gen. II. ROTIPHILA FALL. 



The characters of this genus result from what has been said 

 about DichfEta. Those which distinguish it most easily from the 

 following genera are the intermediate tibise being provided on the 

 upper side with single long bristles, and the thickened costal vein 

 terminating at the tip of the third longitudinal vein. 



We need scarcely mention that but few of the species described 

 by the older authors as Notipliilce, belong to it, in the restricted 

 sense necessary here. Taken in this sense, about sixteen European 

 species have to be referred to it, some of which, however, are not 

 yet duly established. In North America it seems to be repre- 

 sented by numerous species which, compared to those of Europe, 

 show nothing heterogeneous in their organization. The same 

 observation may be made with regard to the South African spe- 

 cies which occur on the Cape ofdGood Hope. 



Synopsis of the Species. 



, f Palpi blackish. 1 scalaris, n. sp. 



I Palpi yellowish. 2 



2 f Antennae quite black. 2 bella, n. sp. 



*- Third joint of the antennae red at the base. 3 



f Upper side of the thorax with a broad brown lateral stripe. 



3 vittata, n. sp. 

 I Upper side of the thorax without broad brown lateral stripe. 4 



f Abdomen with irregular brownish-black semifascise, each formed of 



A ! two spots. 4 carinata, n. sp. 



I Abdomen with two brown spots on each of the intermediate segments. 



(. 5 unicolor, n. sp. 



1. N. scalaris LOEW. and 9 Obscure cinerea, facie angusta 

 fulvescente, antennis palpisque nigris, abdomine fasciis nigris, linea 

 longitudinal! cinerea interrupts picto, pedibus nigris, genibus tarsisque 

 posticis testaceis, tarsis anticis testaceo-annulatis. 



Dark ashy-gray, the small face yellow, antennae and palpi blackish ; ab- 

 domen with two transverse fasciae, interrupted by a gray middle line ; 



